This 10-minute timer was found in the July 1994 Radio Electronics magazine. The relay must be sensitive to the supply voltage used. The capacitors determine time ranges.
This circuit is from Ferranti documentation from 1967. The operational is of the time, but the...
This simple circuit can be used in a robot that follows the light directly feeding a small motor....
This circuit makes the simple test of SCRs that have a low maintenance current, with those of the...